Window locks

ABSTRACT

1,196,421. Window fastenings. HONG KONG CHIAP HUA MFY. CO., (1947) Ltd. 30 April, 1968 [1 May, 1967], No. 20122/67. Heading E2A. A window or door assembly comprises a fixed frame; a closure movably mounted in the frame; a rod 20; means mounting the rod along a member of the frame, the rod being rotatable about an axis along the said member of the frame, and the rod also being longitudinally movable along the said axis; an abutment 32 carried by the rod and rotatable into or out of the path of movement of the closure; means to prevent rotation of the abutment out of the path of movement of the closure when the rod is at one position along the said axis; and a handle 42 which is operable to move the rod longitudinally and to rotate the rod. As shown the handle has an open ended slot 50 in which the abutment 32 of the rod is disposed and the arrangement is such that the rod as well is being pivoted about its axis is also moved longitudinally to disengage a pair of flats 40 on the rod from a corresponding pair of flats of a nylon block 22 and which form the means which prevent the rotation of the abutment. The block 22 and a second bleak 24 mount the rod on the frame. The flats 40 are provided on a portion of the rod which is offset from the remainder of the rod. The rod also causes a second abutment 1-30 as shown. The rod and the abutments can be made of a single piece of material. The abutments are covered by a sleeve.

July 7 1970 ALBERT CHENG sHU LOK 35m2??? WINDOW LOCKS Filad May 1, 1968B Sheets-Sheet 1 2 Sheets-Sheet 2 F/GQ wINDow Looxs ALBERT CHEN@ sHULOK" July 7, 1970 Filed May 1, 1968 United States Patent O 3,519,297WINDOW LOCKS Albert Cheng Shu Lok, Kowloon, Hong Kong, assignor to TheHong Kong Chiap Hua Mfy. C0., (1947) Ltd., Hong Kong Filed May 1, 1968,Ser. No. 725,830 Claims priority, application Great Britain, May 1,1967, 20,122/ 67 Int. Cl. Ec 5 00 U.S. Cl. 292-66 3 Claims ABSTRACT 0FTHE DISCLOSURE A window locking means comprises a rod pivotable aboutand slidable along an axis parallel to its length and extending alongone edge of the window. The rod has a portion that is adapted to engagethe window sash and prevent opening thereof. The rod is also pivotableabout the said axis to withdraw the aforesaid portion from the path ofmovement of the sash to permit opening movement of the window. A handleis provided for sliding and then pivoting the rod between its lockingand unlocking positions.

This invention relates to means for locking a easement window.

The invention can also be applied to the locking of doors, and in thisspeciiication, the word window will be used in a broad sense to includea door, particularly a door of a cupboard, cabinet or the like. As willbe seen from the following, however, the main application of theinvention is in the locking of windows, particularly windows having apane of glass carried in an extruded aluminium or aluminium alloy frame.The invention may be employed in conjunction with the inventiondisclosed in my copending U.S. Pat. application No. 725,727 relating toa window hinge assembly.

It is an aim of the invention to provide a construction that is simpleto manufacture and assemble, has a small number of separate parts, andprovides an eicient and secure lock for the window.

According to the present invention, we provide means for locking aCasement window comprising a rod pivotable about an axis parallel to itslength and extending along one edge of the window, the rod having aportion or being attached to a part that is adapted to engage the windowsash and prevent opening thereof, the rod also being pivotable about thesaid axis to withdraw the aforesaid portion or part from the path ofmovement of the sash to permit opening movement of the window.

The aforesaid portion is preferably constituted by two end portions ofthe rod that are bent at approximately 90 to the general direction ofthe remainder of the rod.

The rod may be pivotally moved by handle, and this may have a slot whichengages one of the aforesaid end portions of the rod bent atapproximately 90 to the length of the rod. The rod may be mounted in apair of blocks, for example of nylon, and these blocks may be mounted bybolting or other suitable means upon a window frame member. The latteris preferably of extruded section aluminium or aluminium alloy.

The invention will be better understood from the following descriptionof an illustrative embodiment thereof, given with reference to theaccompanying drawings, in which:

FIG. 1 is a plan view of a window locking means according to oneembodiment of the invention,

FIG. 2 is a side elevation view corresponding to FIG. l.

FIG. 3 is an end elevation view corresponding to FIG. 2,

FIG. 4 is a side elevation of the locking rod,

FIG. 5 is a plan view of a bracket for supporting the clench handle,

FIG. 6 is a side elevation View corresponding to FIG. 5,

FIGS. 7 and 8 are, respectively, plan and side elevation views of thehandle, and

FIGS. 9 and l0 are, respectively, plan and side elevation views of ablock, for example of nylon, which supports the rod.

Referring firstly to FIGS. 1-3, the illustrated window locking meanscomprises a locking rod 20, for example of 1A diameter stainless steel,supported for pivotable movement by a pair of nylon blocks 22 and 24.These are similar and are illustrated in detail in FIGS. 9 and 10, andinclude slots and channels commonly designated at 23 and 25,respectively. The nylon blocks 22 and 24 are secured to a window framemember 26 by means of screws 28.

The rod 20 is bent as shown in FIG. 4, with the two end portions 30 and32 thereof being bent at 90 to the remainder of the rod. The parts 36and 38 of the rod are supported by the nylon blocks, and, as shown inthe detail view of FIG. 4a, the rod has parallel flats provided on eachside as indicated by reference numeral 40. The width of the rod betweenthe parallel faces is chosen so as to be snugly received in theleft-hand nylon block 28 shown in FIGS. 1 and 2. The purpose of thiswill appear later.

The rod is actuated, i.e. pivoted about the common longitudinal axis ofits parts 36, 36, by a handle 42 having an opening 43 adapted to receivea pin `45 for pivotally mounting the handle on bracket 44. The bracketis secured to the window frame member 26, which may for example be ofextruded aluminium, by screws 46, FIG. 1, which are not shown in FIG. 3and is formed with a longitudinal slot 47, FIG. 6, for receiving thehandle 42. These screws may be advantageously self-tapping screws. Thehandle and the bracket 44 may be of formed stainless steel sheet.

The handle 42 has a slot 50 therein as shown in FIG. 7, and this isadapted to engage and receive the bent end portion 32 of the rod 20 incertain positions of the handle 42. With the rod 20 in the positionshown in FIG. 1, the handle 42 is in the closed position and the bentends 30, 32 project upwardly into the path of movement followed by thewindow sash as the window opens. This can be seen from FIG. 3, in whichthe arrow 52 indicates the opening movement direction of the window sash54.

The window sash 54 is advantageously an extruded member of aluminium oraluminium alloy, and may ad vantageously be pivotally attached to thewindow frame by the hinge assembly forming the subject-matter of myabove noted co-pending U.S. patent application No. 725,727.

When the handle 42 is rotated in an anticlockwise direction as seen inFIG. 1, it will be realised that the rod 20 is withdrawn, i.e. movedtowards the right in FIG. l, and is then pivoted about its own axis dueto the aforesaid engagement of the slot Walls with the bent end 32 ofthe locking rod 20, so that the parallel flats 40 are no longer snuglyreceived by the left-hand nylon block 22.2 Vhen this is done, the endportions, 30, 32 of the rod 20 are pivoted through 90 and take up aposition where they do not impede the opening movement of the windowsash 54. As seen in FIG. 3, in this movement the end portions 30, 32roate anticlockwise about the axis of the rod portion 38.

The end portions 30, 32 of the rod 20 have protective sleeve 60, -62 ofpolyvinyl chloride or like protective synthetic plastics material toprevent undue damage to the ysurface finish of the window sash section54.

With this construction, it has been found that a very secure lockingaction is provided, one end of the window sash being held via endportion 32 in the locked position by the handle 42, and the other end ofthe window sash section being securely held by the end portion 30 whoserotation is further prevented by the co-operation of the parallel flats40 and the slot in the left-hand nylon block 22.

Tests have been carried out, and with this arrangement a window havingwindow-sash height of up to 4 feet can be held, utilising a rod 20approximately 2 feet in length, so that it withstands a maximum pressureof 100 lbs. per square foot without any noticeable deflection. A furtheradvantage of the construction specifically disposed herein is that thewindow cannot be blown open by wind pressure unless the entire assemblyis torn from its mountngs.

It will be appreciated that modifications may be made without departingfrom the scope of the invention.

I claim:

1. Casement window locking means comprising:

(a) a window frame comprising a plurality of window frame members,

(b) a window sash,

(c) a rod having opposed end portions extending transversely to theremainder of the rod,

(d) means for mounting the rod on one of the said window frame membersfor pivotal movement about an axis parallel to its length and so that itextends with its length along the said one frame member, and,

(e) handle means pivotally mounted on said one window frame member forpivotal movement in a plane perpendicular to the plane of said window,said handle being provided with a slot for receiving one of saidopposite end portions of said rod, the pivoting of said handle rstelecting longitudinal movement of said rod and then pivoting of the-sameabout its own axis into and out of the path of movement of the windowsash thereby to effect locking and unlocking of said sash.

2. The locking means of claim 1 wherein said rod is mounted in a pair ofblocks each secured to said window frame member.

3. The locking means of claim 2 in which one of said blocks is slottedto snugly receive a part of said rod provided with parallel ats on itssides, said llats being spaced apart a distance less than the maximumlateral dimension of said rod, when said rod is in its locking position.

References Cited UNITED STATES PATENTS 214,126 4/ 1879 Gusman et al292-57 998,871 7/ 1911 Churchill 292-59 1,728,530 9/ 1929 Drenning292-218 2,072,083 3/ 1937 Campbell 268-117 2,184,086 12/ 1939 Saunders292-217 3,220,759 11/ 1965 Miller 292-218 X RICHARD E. MOORE, PrimaryExaminer

